Mathias j



(No Model.)

M. J. HINDEN. SPEGTAGLE GAGE.

Patented Sept. 23, 1890.

Qwttwzooeo ante/W606 WM M mwo UNITED STATES PATENT OFFICE.

MATHIAS J. HINDEN, OF CLEVELAND, OHIO, ASSIGNOR TO JULIUS KING, OF

- SAME PLACE.

S PECTACLE-GAG E.

SPECIFICATION forming part of Letters Patent No. 437,030, datedSeptember 23, 1890.

Application filed February 24, 1890. SerialNa 341,584. (No model.)

To all whom. it may concern.-

Be it known that I, MATHtAs J. HINDEN, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Spectacle-Gages, ofwhich the following, with the accompanying drawings, is a specification.

This invention relates to certain new and useful improvements inspectacle-gages.

The object of the invention is to provide a cheap and simple frame inthe use of which the opt-ician can readily obtain the pupillarymeasurement and ascertain the number of power of lens required.

To this end the invention consists in the peculiar construction of theframe proper and the means employed for adjusting the same to or fromeach other, in the means for securing the removable lens-rings withinthe frame,in the construction of the temple-joint, and in the peculiarconstruction, arrangement, and combinations of the parts, all as morefully-hereinafter set forth, and pointed out in the claim.

Figure 1 is a front elevation of my improved spectacle-gage with onelensring in place within the frame. Fig. 2 is an enlarged crosssection.on the line 00 0c in Fig. 1. Fig. 3 is a similar View on the line 2' .2,same figure. Figs. 4 and 5 are enlarged details of construction. Fig. 6is an enlarged plan of the nosepiece detached. Fig. 7 is an enlargedelevation of a portion of the rod D, showing the slots which receive theslotted shank of the nose-piece.

In the accompanying drawings, Which form a part of this specification, AA represent two metal annular frames, the inner face of each of which isprovided with two annular undercut channels a a near each edge, leavinga central annular and inwardly-projecting flange b. Secured to each ofthese rings is a segment B, the front faces of which are graduated, asshown.

C are guide-blocks secured to the upper portions of the frames A, andthese guides are bored longitudinally to receive the round rod D. Toeach end of this rod is secured a post cl, through which pass theends-0f the to them proper heads F, by means of which the said shaft maybe rotated. Upon this shaft are formed the right and lefthand screws orthreads eand h, which are adapted to engage with the threaded nuts G,mounted upon or forming an integral part of the guides O. The rod D isgraduated outwardly from its longitudinal center, as shown.

H H represent springs which are designed to hold the lens-rings withinthe frames A. One of these springs is shown in enlarged perspective inthe drawings, Fig. 4:. This spring is rigidly secured at one end to the-frame A, its opposite end being split or bifurcated, each arm of suchbifurcation being provided with a lip 1', adapted to overlap theadjacent edge of the frame to which it is attached.

The lens-ring I is secured in the frame A by inserting one edge of itsflange '11 beneath the lipt' of the spring, which latter is then pushedoutwardly, allowing the lens-ring to rest within the frame A upon theflange b, the resiliency of the spring keeping it within the undercutchannel at.

It will be observed upon reference to the drawings that the lens-ringsmay be inserted and secured within the frames from either side thereofand that they can be readily turned within the frames, as circumstancesmay require.

J represents a nose-piece, the shank J of which is slotted and adaptedto be received in the ways j, formed in the rod D, and to be retainedthereupon'by means of the thumbuut K. By this construction thenose-piece is adapted to have a vertical sliding movement or adjustmenton the rod, and by these means the height of the lenses may be adjusted.

Each of the frames A is provided with an ear L, bifurcated or split toreceive the heel of the temple-plate M. To the inner end of this templeis rigidly secured a plate N, by soldering or other proper means, of asuitable thickness to fit within the split ear, and is secured in placetherein by a screw P. The plate N,being substantially of the form shown,is free to turn inwardlyin closing the temple,

shaft E, the projecting ends having securedwhile its heel 0 will comeincontact with the ear and serve as a stop to prevent the temple frombeing opened too far outwardly.

The frame A can be readily moved inwardly or outwardly by rotating theshaft E until an object is distinctly seen by both eyes through thecenters of the glasses, and the pupillary distance is read 01? on thegraduated rod D.

The practical Optician will readily perceive the advantages gained inthe present construction over those now in use, and as the generaloperation of devices of this character is so well understood it is notdeemed necessary to here enter into a full description of suchoperation.

\Vhat I claim as my invention is- In a spectacle-gage, the combinationof two eye-frames adapted to be adjusted to orfrom each other upon thesame horizontal plane and provided with the undercut channels separatedby a central inwardly-projecting annular flange, bifurcated springshaving lips adapted to overlap the edges of said frames, and lens-ringsprovided with annular flanges adapted to engage said undercut channelsand beheld therein by the resiliency of said springs, substantially asdescribed.

In testimony whereof I aflix my signature, in presence of two witnesses,this 18th day of February, 1890.

MATIIIAS J. I'IINDEN.

Witnesses:

H. S. SPRAGUE, I I. L. WARREN.

